Patch vulcanizing outfit



' Feb. 19; 1935. G. s. DAWE 1,994,380

PATCH VULCANIZING OUTFIT Filed July 21, 1933 Patented Feb. 19, 1935 i i I I I a [UNITED STATES PATENTOFFlCE PATCH VULCANIZING OUTFIT George Samuel Dawe, Mortdale, near Sydney,

New South Wales, Australia;

v j Application July 21, 1933, Serial N 681,607

j In Australia August 10, 1932 I 3' Claims. (01. 18-18 This invention relates to portable: patch vulpriate caustic alkali which when subjected to the canizing outfits which are especially adapted for action of the acid will generate sufficient heat to use in vulcanizing patches. onto rubber articles effect the required vulcanization. The admixsuch as the tyre tubes 'of motor vehicles,'and ture of the chemicals is brought about by the V 5 which are of the typeiwhich includes a heating fracturing of the acid-containing vessel'asa result 5- unit and a clamp, the heating unit being superof distortion of part of the container when being I imposed on the repair patch and the whole clamped on to the job. The'o'perative headof clamped on to the article to be repaired. the clamp is formed to bear upon the peripheral Hitherto in this typeof device; the heating unit upper edge of the container, and has a central has been in the form of a pan containing or excrescence'or pip which bears upon and de- 10" adapted to contain a block of combustible mate-'- presses the top of the container sufliciently to rial and the required heat is obtained by combusfracture the glass vessel within. 1

tion of this material which is ignited by the ap- To fullyexpl'ain the invention reference isnow plication of a flame and burns until consumed. made to the accompanying drawing which depicts Itis obvious that a naked flame near a motor a preferred embodiment and'in which 15-- vehicle is a source of danger owing to the pres- Fig. 1 is a perspective view ofa heating unit, ence usually of a body of highly inflammable liq- Fig. 2 a similar view inverted,

. uid, and occasionally of inflammable gas. More- Fig. 3 is a sectional plan, and

over, in the open air when there is considerable Fig. 4 is a sectional elevation on plane 4, 4- of wind, there is a difiiculty sometimes in igniting Fig. 1. 20

the combustible block, in maintaining regularity Fig. 5 is a sectional elevation of a complete of combustion, and obtaining the required heat outfit applied to a collapsed tyre-tube.

for vulcanization. The heating unit comprises a pressed or spun It is the object of this invention to provide a metal container A with a thin metal dished top a repair ,vulcanizing outfit in which the required B hermetically secured thereon in known manheat is obtained by chemical action, the heat bener. Within the container is a sealed glass vesing obtained by or resulting from the admixture sel 0 containing commercial sulphuric acid, and of appropriate chemicals- A further object of the about said vessel is a quantity D of a powdered invention is to provide an outfit which when in strong caustic alkali such as caustic soda or use is fumeless, unaffected bydampness, wind or caustic potash. Located between the cover B other atmospheric influences and is therefore and vessel C and tightlyfitting in the container effective under practically all conditions and at A is a, washer E of soft cardboard or like moderall times. ately compressible substance which when thetop With these objects in view the invention conis secured on the container is very adjacent to sists in a vulcanizing unit for a patch repair outthe v el C, This vess l is f l ss length th n 35 fi 0f the ype referred COmDriSiHg a closed the container, and is held in position by flexed hollow metal container of deformable construcpieces of cardboard E against which the ends tion, a repair patch secured to one exterior face of the vessel C bear as shown in Figs. 3 and 5. of said container, withinsaid container a sealed The purpose of the cardboard pieces E is to 40 glass vessel containing a liquid acid and which is prevent thev vessel C from moving in the con- 40 fractured to release said acid by sufiicient defortainer A and being thus accidentally fractured, mation of said container, and a quantity of a andthe washer E serves to keep air from the chemical Substance Packed adjacent a Vessel powdered chemical in the interval between the in said container, said chemical substance (30- filling and closing of the container.

operating with the released acid to generate heat Secured to the bottom of the container is the by chemical reaction'to efiect vulcanization of repair patch F prepared inknown manner. the patch. The clamp is generally of ordinaryconstruc- In a preferred embodiment of the invention the tion comprising a yoke member G with fixed lower hea unitconsists of an app p te y Shaped platen H, and a screw-threaded head J in which hollow and hermetically sealed containerinwhich is fitted a threaded spindle K having at its is a sealed phial or vessel of readily fracturable upper end a turning handle L and at itslower and acid proofmaterialysuch as glass, charged end a rotatably mounted'operative head M. This withafluidsuch as commercial sulphuric acid, and head has a peripheral flange M adaptedto fit packed about said vessel is-a quantity of a comabout the upper part of the container A and is 5 plementary chemical substance such as an appro-' centrally formed with a bulge or excrescence O adapted to bear upon the top B of the container as the spindle K is screwed down and to depress it sufficiently to fracture the vessel C and release the acid. The construction is such that this fracturing of the vessel C occurs immediately before the head M bears upon the container rim, and the parts are proportioned accordingly, it being understood that the bearing of excrescence '0 on the top B must not prevent the ultimate bearing of the head M on the rim of the con- 1tainer equally at all points in order to provide an even pressure on the patch F.

Fig. 5 shows the application of the outfit to the repair of a punctured tube T shown in section.

It will be understood that the vessel C should be so disposed and of such dimensions that very slight depression of the top B of' the container will result in fracture, and that the material of which the vessel is made should be of such character that complete fracture occursthat is to say, sufficient to allow the whole of the contained chemical to escape. a

The relative proportions of the chemicals are such that the required heat is obtained and maintained for a sufiicient length of-time to effect its purpose, and also effect complete re-action. so that after the re-action has ceased, there is produced a neutral residual substance.

I claim:

l. A vulcanizing unitfor a patch repair outfit of the type referred to, comprising a closed hollow metal container of deformable construction, a repair patch secured to one exterior face of said container, within said container .a sealed glass vessel containing a liquid acid and which is fractured to release said acid by sufficient devthe lower face of said container, within said container a sealed glass vessel containing liquid acid and which is fractured to release the acid by deformation of the said upper face of the container, a quantity of a chemical substance packed about said glass vessel, said chemical substance co-operating with the released acid to generate vulcanizing heat, andpacking about said glass vessel toprevent movement of it in the container.

3. A vulcanizing patchMrepair outfitinoluding a 'vulcanizing unit comprising a closed hollow.

container of deformable metal, a patch secured to. an exterior face of said container, within said container a glass vesselv containing. liquid acid and which. is fractured upon deformation of the container, a quantity of a chemicalsubstance packed adjacent said glass vessel and which cooperates with said acid to generate'vulcanizing heat forthe said patch upon deformation of the metallic container, and a clamp fitted with an adjustable operative head formed to hold the vulcanizing unit on the work and to deform the metallic container sufllciently .to fracture the glass vessel. L

GEORGE SAMUEL DAWE. 

